Andre gobron



(No new.)

I A. GOBRON.

SAFETY BOLT PoR GYGLBS.

f77/Ue' 7126074- Patefnte'd Dec. 14,

A radi/e2 io Za ron;

UNITED STATES PATENT OFFICE.

ANDRE GOBRON, OF PARIS, FRANCE.

SAFETY-BOLT FOR CYCLES.

SPECIFIGATION forming part of Letters Patent No. 595,622, dated December 14, 1897.

Application led March 29,1897.A Serial No. 629,655. (No model.)

.To all whom, it may con/cern.'

Beit known that I, ANDRE GoBRoN, a citizen of the Republic of France, residing at Paris, France, have invented certain new and useful Improvements in Safety-Bolts for Cycles, of which the following is a specification.

This invention relates generally to bicyclelocks of that class designed to be attached as a permanency to a bicycle-frame and coact with the movable parts of the bicycle, such as the sprocket-Wheels, to lock the same from vmovement and thereby serve as a visible evidence of theft; and it particularly relates to a lock adapted to this purpose provided with a bolt having a longitudinal as well as a rotative movement, as with a door-bolt.

The invention therefore consists in the parts as hereinafter shown, described, and claimed.

In the accompanying drawings, which illustrate my invention, Figure l is a perspective view of my improved bicycle-lock and enough of the frame and the movable parts of the bicycle to illustrate the application of the lock thereto. Fig. 2 isa longitudinal sectional view of the lock, illustrating the locking-bolt in its retracted position. Fig. 3 is a plan view of thesame, the cover being shown in section. Fig. 4 is an end elevation of .the lock. Fig. 5 is a transverse section of the lock, taken at a point indicated by lines x y, Fig. 2. Fig. 6 is a View similar to Fig. 2, illustrating the locking-bolt in a projected position; and Fig. 7 is a detail view of the key for projecting and revolving the locking-bolt.

The lock consists of a base-plate A, permanently secured to the tubing constitutingv the frame of the bicycle, preferably at a point slightly forward of the rear wheel and in alinement with the main sprocket -wheel. Depending from one side of the plateA is a lug 0.', having hinged thereto a strap P, between which and the plate A is clamped one side tube R of the lower rear fork of lthe bicycle, tension being secured thereon by means of a headed screw V, passing through the strap P and screwing into a lug T, depending from the base-plate.

O designates a strap, preferably iiexible, which is secured at one end permanently to the base-plate A upon the side of said plate opposite to the lug a', the inner ends of the straps P and O being provided with depending lugs p and o', respectively. Passing through perforations in the said lugs is a tension-bolt Q, by which tension may be placed upon the strap O to clamp said strap around Athe opposite bicycle-tubing S, all as shown in walls B andC, preferably semicircularupon their upper ends and over which the cover M fits and is secured, thus forming, through the medium of the base-plate, the end walls, and

the cover, an inclosure in which the Working parts of the lock are housed.

D designates a partition projecting up- Wardly from the base-plateA, the partition and the side Wall B each being provided with an enlarged opening, in which the lockingbolt E fits and is guided in its longitudinal and rotative movement.

The locking-bolt is provided upon one end with an annular enlargement F, located normally slightly in front of the side wall C.

Movably arranged upon the bolt E between the enlargement F and the partition D is a washer or disk I-I, the partition, disk, and enlargement having oriices arranged upon opposite sides thereof, respectively, as at f, and secured in the orifices in the disks are rods I, the ends thereof projecting through the orifices in the partition D and of a length to project when in alinement into the orifices in the enlargement F. Arranged upon the rods and bearing against the disk I-I and the partition D, respectively, are coiled springs J, which have a normal tendency to force the disk H against the enlargement F upon the bolt to retract the bolt. At a point upon the periphery of the enlargement F and the disk H the enlargement and disk are cnt away, as at L, Fig. 5, and projecting upwardly from the baseplate A is a lug K, which has a contour adjacent to the enlargement on the disk to be in the path of travel of the same, but to allow IOS the enlargement or disk to pass the lug when the cut-away portion L is in alinement therewith.

Projecting inwardly from the side wall C is an annular extension a, the side wall and extension each being provided with a keyholeslot C', which allows of the insertion of the key, the extension serving as a guide for the key. Pivotally secured to the end wall C is a plate N, which serves to cover the slot C and prevent the entrance of dust, dsc., into the interior of the lock.

G designates the key, provided with the usual stem t and the oppositely-protruding webs h, and projecting forwardly from each web are projections g, which are of a diameter in cross-section substantially equal to the diameter of the orifice fin the enlargement F of the locking-bolt E.

In operation, the bolt being in a retracted position, as shown in Figs. 2 and 3, to project the saine the key G is inserted through the keyhole-slot C', a projection c upon the bolt` entering a correspondingly-shaped orifice in the key until the end of the stem of the key abuts against the enlargement F, when by forcing in the key the locking-bolt and its enlargement Fand the disk H are forced inwardly against the tension of springs J, `projecting the bolt between the spokes of the sprocket-wheel of the bicycle. After the bolt has been projected to a degree (shown in Fig. (i) the edge of the enlargement F has been forced beyond the lug K, it being understood that when the bolt is retracted the lug is in alinement with the cut-away portions L in the enlargement F and disk Il, when by revolving the key a one-half turn, the projections g upon the key forcing the ends of the rods I out of the orifices f in the enlargement F, the

, bolt, and consequently the enlargement, is revolved until the edge of the enlargement abuts against the lug K and the bolt is held in a projected position. To remove the key, the key is pulled back and revolved a one-half turn until the webs 7L aline with the slots of the keyhole, when the key can be pulled out.

To retract the bolt, it is only necessary to insert the key and revolve the same until the projections g find the orifices in the enlargement F, when by revolving the bolt until the ends of the rods I enter the orifices fthe cutaway portion L of the enlargement F and the disk H is in alinelnent with the lug K, when the spring will force the bolt back, retraeting the same.

It will readily be seen that by providing varions-shaped projections e to the bolt and correspondingly-shaped orifices in the stem of the key that each lock may be provided with a particular key.

1. In a bicycle-lock, a lock-case and baseplate adapted to be secured to the frame adjacent to the gear-wheel of the driving-axle, a bolt inclosed and guided therein adapted to be rotated and projected longitudinally therein to engage transversely to and with said gear-wheel, suitable key-seats and apertures respectively in the end of the bolt and the lock-case and means engaging the key-apertures in the end of the bolt for locking the same, a spring for retracting the bolt and suitablemeans for engaging the rotative bolt with a fixed part of the casing to prevent its retraction, substantially as described.

2. In a lock, a base-plate, a locking-bolt guided and having a longitudinal movement thereon, springs for holding the bolt in a retracted position, a projection upon the baseplate, an annular enlargement upon the bolt having a cut-away portion, whereby when the bolt is projected and revolved the enlargement bears against the projection to hold the bolt in a projected position.

3. In a bicycle-lock, in combination with a bicycle, a base-plate secured thereto, side walls projecting upwardly from the baseplate, a partition projecting upwardly from the base-plate intermediate the side walls, a locking-bolt guided by one of the side walls and the partition, and having a longitudinal movement therein, an annular enlargement upon one end of the bolt, a movable disk arranged upon the bolt intermediate the enlargement and the partition, oriiices in the `opposite sides of the partition, disk and enlargement respectively, rods secured in the orifices of t he disk, one end extending through the oriiices of the partition, the opposite `ends projecting into the orifices in the enlargement when the said `orifices are in alinement therewith, manual means for projecting the bolt and mechanical means comprising springs upon the rods bearing upon the partition and the disk respectively for retractin g the bolt.

In testimony whereof I have set my hand in the presence of the two undersigned witnesses.

ANDRE GOBRON.

7Witnesses:

EDWARD P. MACLEAN, J. ALLIsoN BOWEN.

IOO 

